Symbol, Chemistry.
  1. fermium.


  1. Electronics. frequency modulation: a method of impressing a signal on a radio carrier wave by varying the frequency of the carrier wave.
  2. Radio. a system of radio broadcasting by means of frequency modulation.
  3. of, relating to, or utilizing such a system.
Compare AM.



  1. (in prescriptions) make a mixture.

Origin of f.m.

From the Latin word fīat mistūra Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for fm

Contemporary Examples of fm

Historical Examples of fm

  • Each sex produces two sorts of gametes, Mf and mf in the case of the male, and Fm, fm in that of the female.


    Reginald Crundall Punnett

  • The FM stations operate exclusively in the very high frequency range and are all moderately powered at four kilowatts.

    Area Handbook for Romania

    Eugene K. Keefe, Donald W. Bernier, Lyle E. Brenneman, William Giloane, James M. Moore, and Neda A. Walpole

British Dictionary definitions for fm


abbreviation for
  1. fathom
  2. from
the internet domain name for
  1. Micronesia


the chemical symbol for
  1. fermium


abbreviation for
  1. frequency modulation
  2. Field Marshal
  3. aeronautics figure of merit
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

fm in Medicine


  1. The symbol for the elementfermium
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

fm in Science


  1. The symbol for fermium.


  1. Abbreviation of frequency modulation


  1. A synthetic, radioactive metallic element of the actinide series that is produced from plutonium or uranium. Its most stable isotope is Fm 257 with a half-life of approximately 100 days. Atomic number 100. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.